The Silicone Rubber for Extrusion adopts “double 2, 4” or platinum vulcanizing agent, the finished product has excellent characteristics as heat resistance, cold resistance and electric insulativity, it is suitable for all kinds of silicone tube, sealing strips, shaped article and silicone foam article, etc. The series of HT7851B are used for producing common extrusion products, especially for additive products. The series of HT751 are used for producing products which require higher transparency and less xanthochromia.